ObboMed SH-4050 12V 30W Portable Heated Seat Pad Cover with Premium Tight Fit Cigarette Lighter Plug and Secure Hook Straps for Car, Automobile, Vehicle, Home, Office Lightweight and portable heated pad keep you warm & comfortable in winter to avoid sleepiness and dizziness by car heater. CAUTIONS: Ensure to insert the plug into the bottom of socket and turn around the socket to ensure the tight fit between plug and socket. The key is the "contact" between plug and socket. When the "contact" become loose caused by the unavoidable bumping car along the road, the electrical resistance will become high and generate high heat between the "contacts" and become possible malfunctions. As such, the driver has to check the "contact" is always firm and tight from time to time. Refined 12V car premium cigarette plug with UL 5Amp fuse to minimize loose connection between plug and socket in the long run, ON-OFF control switch and LED power indicator. Hook straps at four corners of pad securely affix to the car seat, keeping pad stay in place without getting loose after long-term use. New thermostat to control overload and overheating will quickly reset to heating performance and ensure maximum safety. Optional AC 110V-230V to DC 12V, 4A adapter for home use (not included, check ObboMed PD-1204AUS 12V 4A AC/DC Power Adapter with Cigarette Lighter Connector: http://www.amazon.com/dp/B00XBO35C2) Heating pad for car seat, including power cord with premium plug 12V DC for cigarette lighter socket 4 Metal hooks User&#039;s manual Dimensions : 47 x 47 cm / 18.5 x 18.5 inches Color : Black Material : Jacquard fabric, non-woven fabric, heating wires Working Power : DC 12V, 2.5 A Current/ Watts : 30W Power Cord Length: 170cm / 67inches SH-4050: 12V Heated Seat Pad SH-4100: 12V Heated Seat Cushion Cover, Utility Model SH-4150: 12V Heated Seat Cushion Cover, Standard Model Locking mechanism to minimize loose connection between plug and socket. Built-in5Amp fuse. Control switch of 2 warming stages, On-Off, On = Fast Heating (30W). LED power indicator.